DE3574441D1 - Television picture and sound scrambler and method - Google Patents

Television picture and sound scrambler and method

Info

Publication number
DE3574441D1
DE3574441D1 DE8585305620T DE3574441T DE3574441D1 DE 3574441 D1 DE3574441 D1 DE 3574441D1 DE 8585305620 T DE8585305620 T DE 8585305620T DE 3574441 T DE3574441 T DE 3574441T DE 3574441 D1 DE3574441 D1 DE 3574441D1
Authority
DE
Germany
Prior art keywords
television picture
scrambler
sound
sound scrambler
television
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8585305620T
Other languages
German (de)
Inventor
Kantilal Mistry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BLONDER TONGUE LAB
Original Assignee
BLONDER TONGUE LAB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BLONDER TONGUE LAB filed Critical BLONDER TONGUE LAB
Application granted granted Critical
Publication of DE3574441D1 publication Critical patent/DE3574441D1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/166—Passage/non-passage of the television signal, e.g. jamming, band suppression
DE8585305620T 1984-10-15 1985-08-07 Television picture and sound scrambler and method Expired DE3574441D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/661,091 US4682359A (en) 1984-10-15 1984-10-15 Television picture and sound scrambler and method

Publications (1)

Publication Number Publication Date
DE3574441D1 true DE3574441D1 (en) 1989-12-28

Family

ID=24652174

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585305620T Expired DE3574441D1 (en) 1984-10-15 1985-08-07 Television picture and sound scrambler and method

Country Status (4)

Country Link
US (1) US4682359A (en)
EP (1) EP0178758B1 (en)
JP (1) JPS61159884A (en)
DE (1) DE3574441D1 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61139176A (en) * 1984-12-10 1986-06-26 Pioneer Electronic Corp Audio visual control device of catv
US4912760A (en) * 1988-03-10 1990-03-27 Scientific Atlanta, Inc. Off-premises cable television channel interdiction method and apparatus
US5208854A (en) * 1988-03-10 1993-05-04 Scientific-Atlanta, Inc. Picture carrier controlled automatic gain control circuit for cable television interdiction or jamming apparatus
US5303295A (en) * 1988-03-10 1994-04-12 Scientific-Atlanta, Inc. Enhanced versatility of a program control by a combination of technologies
US5287539A (en) * 1988-03-10 1994-02-15 Scientific-Atlanta, Inc. Interdiction program denial system for jamming audio and video signals
US5142574A (en) * 1988-03-10 1992-08-25 West Jr Lamar Optimum amplitude and frequency of jamming carrier in interdiction program denial system
US5289541A (en) * 1988-03-10 1994-02-22 Scientific-Atlanta, Inc. Interdiction method and apparatus with constant blanking and variable dwell times
US5014309A (en) * 1988-03-10 1991-05-07 Scientific-Atlanta, Inc. Off-premises cable television channel interdiction method and apparatus
US5463689A (en) * 1988-03-10 1995-10-31 Scientific-Atlanta Interdiction method and apparatus with random mode jamming
US5323462A (en) * 1988-03-10 1994-06-21 Scientific-Atlanta, Inc. CATV subscriber disconnect switch
US4951315A (en) * 1988-12-30 1990-08-21 Switsen Henry N Video signal noise evaluation and removal circuit
US5317635A (en) * 1992-06-10 1994-05-31 Scientific-Atlanta, Inc. Interdiction method and apparatus with mode control for variable frequency elements
WO1993026127A1 (en) * 1992-06-10 1993-12-23 Scientific-Atlanta, Inc. Interdiction method and apparatus with direct memory control of variable frequency elements
US5278908A (en) * 1992-06-10 1994-01-11 Scientific-Atlanta, Inc. Interdiction method and apparatus with programmable jamming effectiveness
WO1993026126A1 (en) * 1992-06-10 1993-12-23 Scientific-Atlanta, Inc. Interdiction method and apparatus with frequency change inhibit function
US6070061A (en) * 1997-10-03 2000-05-30 Zenith Electronics Corporation Adjacent channel rejection in double conversion tuner
KR20030009966A (en) * 2001-07-24 2003-02-05 정일영 TV chennel Scramble System

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3175033A (en) * 1960-08-26 1965-03-23 Isaac S Blonder Television receiver control using filter for carrier removal
US3202758A (en) * 1961-11-09 1965-08-24 Paramount Pictures Corp Subscription-television programscrambling system
US3813482A (en) * 1972-07-24 1974-05-28 Blonder Tongue Lab Method of and apparatus for scramble-encoded transmission and decoded reception for over the air and cable subscription television and the like
US4085422A (en) * 1973-10-31 1978-04-18 Hokuryo Denko Co., Ltd. Fee-charging apparatus for television sets
US4268860A (en) * 1974-09-25 1981-05-19 Blonder-Tongue Laboratories, Inc. Television subscriber apparatus
US4039954A (en) * 1975-05-27 1977-08-02 Oak Holland B.V. Signal distribution device for a cable television
US4074311A (en) * 1976-06-18 1978-02-14 Tanner Electronic Systems Television security system
US4095258A (en) * 1976-10-15 1978-06-13 Blonder-Tongue Laboratories, Inc. Apparatus for decoding scrambled television and similar transmissions
US4163252A (en) * 1976-11-03 1979-07-31 Blonder-Tongue Laboratories, Inc. Subscription television decoder apparatus
US4222067A (en) * 1978-06-23 1980-09-09 Stern Joseph L Tamper-resistant television signal scrambling
JPS5539444A (en) * 1978-09-13 1980-03-19 Pioneer Electronic Corp Scramble/descramble system for catv broadcast
DE3125767A1 (en) * 1980-07-05 1982-06-09 Communications Patents Ltd., London CABLE TV SYSTEM

Also Published As

Publication number Publication date
US4682359A (en) 1987-07-21
EP0178758A1 (en) 1986-04-23
JPS61159884A (en) 1986-07-19
EP0178758B1 (en) 1989-11-23

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee